Sermorelin typically works gradually, with improvements in sleep and energy showing up within a few weeks and other changes over a few months

GHK-Cu published research history: - First isolated and characterized: 1973 - Continuous peer-reviewed publication: 50+ years - Published research covering: wound healing, skin biology, COPD, oxidative stress, bone, skeletal muscle, gastrointestinal, neurological, gene expression, aging - Mechanistic characterization: Multiple pathways identified, SIRT1 direct binding confirmed in 2025 - Cell and animal model validation: Extensive across multiple tissue types and species Matrixyl 3000 (palmitoyl tripeptide-1 + palmitoyl tetrapeptide-7) research: - Commercial introduction: Early 2000s - Research base: Primarily cosmetic science and dermatology literature - Mechanistic characterization: Primarily focused on TGF-beta receptor and IL-6 pathways - Depth: Narrower tissue focus, smaller body of published mechanistic research For researchers who need a compound with extensive published mechanistic context, detailed gene expression data, or research across multiple tissue types, GHK-Cu's research depth is substantially greater

Thanks for the reply
Doi: 10.1007/s00125-025-06466-8
In a double-blind trial of 120 participants, 93% reported a measurable reduction in daily shedding after 150 days of twice-weekly mesotherapy plus daily topical use
Menopause and melatonin